diff --git a/backend/src/v5/models/tickets.constants.js b/backend/src/v5/models/tickets.constants.js
index 55e8c0d6db..a4bb2b9b59 100644
--- a/backend/src/v5/models/tickets.constants.js
+++ b/backend/src/v5/models/tickets.constants.js
@@ -43,16 +43,25 @@ Tickets.operatorToQuery = {
 		}) },
 	}),
 	[queryOperators.NOT_EQUALS]: (propertyName, value) => ({
-		[propertyName]: { $not: { $in: value.flatMap((v) => {
-			if (isNumberString(v)) return [Number(v), new Date(Number(v))];
-			return toBoolean(v);
-		}) } },
-	}),
+		$or: [
+			{ [propertyName]: { $not: { $in: value.flatMap((v) => {
+				if (isNumberString(v)) return [Number(v), new Date(Number(v))];
+				return toBoolean(v);
+			}) } } },
+			{ [propertyName]: { $exists: false } },
+		],
+	}
+	),
 	[queryOperators.CONTAINS]: (propertyName, value) => ({
 		$or: value.map((val) => ({ [propertyName]: { $regex: val, $options: 'i' } })),
 	}),
 	[queryOperators.NOT_CONTAINS]: (propertyName, value) => ({
-		$nor: value.map((val) => ({ [propertyName]: { $regex: val, $options: 'i' } })),
+		$or: [
+			{ $nor: value.map((val) => ({
+				[propertyName]: { $regex: val, $options: 'i' },
+			})) },
+			{ [propertyName]: { $exists: false } },
+		],
 	}),
 	[queryOperators.RANGE]: (propertyName, value) => ({
 		$or: value.flatMap((range) => [
@@ -61,10 +70,15 @@ Tickets.operatorToQuery = {
 		]),
 	}),
 	[queryOperators.NOT_IN_RANGE]: (propertyName, value) => ({
-		$nor: value.flatMap((range) => [
-			{ [propertyName]: { $gte: range[0], $lte: range[1] } },
-			{ [propertyName]: { $gte: new Date(range[0]), $lte: new Date(range[1]) } },
-		]),
+		$or: [
+			{
+				$nor: value.flatMap((range) => [
+					{ [propertyName]: { $gte: range[0], $lte: range[1] } },
+					{ [propertyName]: { $gte: new Date(range[0]), $lte: new Date(range[1]) } },
+				]),
+			},
+			{ [propertyName]: { $exists: false } },
+		],
 	}),
 	[queryOperators.GREATER_OR_EQUAL_TO]: (propertyName, value) => ({
 		$or: [
diff --git a/backend/src/v5/processors/teamspaces/projects/models/commons/tickets.js b/backend/src/v5/processors/teamspaces/projects/models/commons/tickets.js
index 90ead0c7ec..60dc7b6ec5 100644
--- a/backend/src/v5/processors/teamspaces/projects/models/commons/tickets.js
+++ b/backend/src/v5/processors/teamspaces/projects/models/commons/tickets.js
@@ -387,9 +387,9 @@ Tickets.getTicketList = async (teamspace, project, model,
 	if (sortBy && propertyToFilterName(sortBy)) {
 		sort = { [propertyToFilterName(sortBy)]: sortDesc ? -1 : 1 };
 	}
-
 	if (queryFilters.length) {
 		const queryInfo = await getQueryInfoFromQueryFilters(teamspace, queryFilters);
+
 		return getTicketsByFilter(teamspace, project, model,
 			deleteIfUndefined({ projection, updatedSince, sort, limit, skip, ...queryInfo }));
 	}
diff --git a/backend/tests/v5/e2e/routes/teamspaces/projects/models/common/tickets.test.js b/backend/tests/v5/e2e/routes/teamspaces/projects/models/common/tickets.test.js
index f36a7a7155..5eb5516548 100644
--- a/backend/tests/v5/e2e/routes/teamspaces/projects/models/common/tickets.test.js
+++ b/backend/tests/v5/e2e/routes/teamspaces/projects/models/common/tickets.test.js
@@ -652,8 +652,22 @@ const testGetTicketList = () => {
 		templateWithAllProps.properties.push(textProp, longTextProp, numberProp, boolProp, dateProp,
 			oneOfProp, manyOfProp);
 
-		con.tickets = times(10, (n) => ServiceHelper.generateTicket(templatesToUse[n % templatesToUse.length]));
-		fed.tickets = times(10, (n) => ServiceHelper.generateTicket(templatesToUse[n % templatesToUse.length]));
+		con.tickets = times(13, (n) => ServiceHelper.generateTicket(templatesToUse[n % templatesToUse.length]));
+		fed.tickets = times(13, (n) => ServiceHelper.generateTicket(templatesToUse[n % templatesToUse.length]));
+
+		delete con.tickets[12].properties[textProp.name];
+		delete con.tickets[12].properties[longTextProp.name];
+		delete con.tickets[12].properties[numberProp.name];
+		delete con.tickets[12].properties[dateProp.name];
+		delete con.tickets[12].properties[oneOfProp.name];
+		delete con.tickets[12].properties[manyOfProp.name];
+
+		delete fed.tickets[12].properties[textProp.name];
+		delete fed.tickets[12].properties[longTextProp.name];
+		delete fed.tickets[12].properties[numberProp.name];
+		delete fed.tickets[12].properties[dateProp.name];
+		delete fed.tickets[12].properties[oneOfProp.name];
+		delete fed.tickets[12].properties[manyOfProp.name];
 
 		beforeAll(async () => {
 			await setupBasicData(users, teamspace, project, [con, fed, conNoTickets, fedNoTickets],
@@ -711,10 +725,12 @@ const testGetTicketList = () => {
 			const existsPropertyFilters = (propType, propertyName) => [
 				[`${queryOperators.EXISTS} operator is used in ${propType} property`,
 					{ ...baseRouteParams, options: { query: `'${propertyName}::${queryOperators.EXISTS}'` } }, true,
-					model.tickets.filter((t) => t.type === templateWithAllProps._id)],
+					model.tickets.filter((t) => t.type === templateWithAllProps._id
+						&& Object.hasOwn(t.properties, propertyName))],
 				[`${queryOperators.NOT_EXISTS} operator is used in ${propType} property`,
 					{ ...baseRouteParams, options: { query: `'${propertyName}::${queryOperators.NOT_EXISTS}'` } }, true,
-					model.tickets.filter((t) => t.type !== templateWithAllProps._id)],
+					model.tickets.filter((t) => t.type !== templateWithAllProps._id
+					|| !Object.hasOwn(t.properties, propertyName))],
 			];
 
 			const equalsPropertyFilters = (propType, propertyName) => [
@@ -745,9 +761,11 @@ const testGetTicketList = () => {
 						model.tickets.filter((t) => t.properties[propertyName]
 							=== model.tickets[0].properties[propertyName])],
 					[`${queryOperators.NOT_CONTAINS} operator is used in ${propType} property`,
-						{ ...baseRouteParams, options: { query: `'${propertyName}::${queryOperators.NOT_CONTAINS}::${model.tickets[0].properties[propertyName]}'` } }, true,
-						model.tickets.filter((t) => t.properties[propertyName]
-							!== model.tickets[0].properties[propertyName])],
+						{ ...baseRouteParams,
+							options: { query: `'${propertyName}::${queryOperators.NOT_CONTAINS}::${model.tickets[0].properties[propertyName]}'` } },
+						true,
+						model.tickets
+							.filter((t) => t.properties[propertyName] !== model.tickets[0].properties[propertyName])],
 				];
 			};
 
@@ -769,7 +787,9 @@ const testGetTicketList = () => {
 						.filter((t) => t.properties[manyOfProp.name]?.some((val) => val.slice(0, 5)
 							=== model.tickets[0].properties[manyOfProp.name][0].slice(0, 5)))],
 				[`${queryOperators.NOT_CONTAINS} operator is used in ${propTypes.MANY_OF} property`,
-					{ ...baseRouteParams, options: { query: `'${manyOfProp.name}::${queryOperators.NOT_CONTAINS}::${model.tickets[0].properties[manyOfProp.name][0].slice(0, 5)}'` } }, true,
+					{ ...baseRouteParams,
+						options: { query: `'${manyOfProp.name}::${queryOperators.NOT_CONTAINS}::${model.tickets[0].properties[manyOfProp.name][0].slice(0, 5)}'` } },
+					true,
 					model.tickets
 						.filter((t) => !t.properties[manyOfProp.name]
 							?.some((val) => val.slice(0, 5)
@@ -793,7 +813,9 @@ const testGetTicketList = () => {
 						>= model.tickets[0].properties[propertyName] - 500
 						&& t.properties[propertyName] <= model.tickets[0].properties[propertyName] + 500)],
 				[`${queryOperators.NOT_IN_RANGE} operator is used in ${propType} property`,
-					{ ...baseRouteParams, options: { query: `'${propertyName}::${queryOperators.NOT_IN_RANGE}::[${model.tickets[0].properties[propertyName] - 500},${model.tickets[0].properties[propertyName] + 500}]'` } }, true,
+					{ ...baseRouteParams,
+						options: { query: `'${propertyName}::${queryOperators.NOT_IN_RANGE}::[${model.tickets[0].properties[propertyName] - 500},${model.tickets[0].properties[propertyName] + 500}]'` } },
+					true,
 					model.tickets.filter((t) => !t.properties[propertyName] || (t.properties[propertyName]
 					< model.tickets[0].properties[propertyName] - 500
 					|| t.properties[propertyName] > model.tickets[0].properties[propertyName] + 500))],
diff --git a/backend/tests/v5/unit/processors/teamspaces/projects/models/commons/tickets.test.js b/backend/tests/v5/unit/processors/teamspaces/projects/models/commons/tickets.test.js
index de85f8de7f..6437a7cdbb 100644
--- a/backend/tests/v5/unit/processors/teamspaces/projects/models/commons/tickets.test.js
+++ b/backend/tests/v5/unit/processors/teamspaces/projects/models/commons/tickets.test.js
@@ -1220,12 +1220,19 @@ const testGetTicketList = () => {
 		}],
 		[`${queryOperators.NOT_EQUALS} query filter and boolean value`, [], {}, undefined, { }, {
 			queryFilters: [{ propertyName, operator: queryOperators.NOT_EQUALS, value: ['true'] }],
-			expectedQuery: { $and: [{ [propertyName]: { $not: { $in: [true] } } }] },
+			expectedQuery: { $and: [{ $or: [
+				{ [propertyName]: { $not: { $in: [true] } } },
+				{ [propertyName]: { $exists: false } },
+			] }] },
 		}],
 		[`${queryOperators.NOT_EQUALS} query filter and number value`, [], {}, undefined, { }, {
 			queryFilters: [{ propertyName, operator: queryOperators.NOT_EQUALS, value: [`${propertyNumberValue}`] }],
 			expectedQuery: {
-				$and: [{ [propertyName]: { $not: { $in: [propertyNumberValue, new Date(propertyNumberValue)] } } }],
+				$and: [{ $or: [
+					{ [propertyName]: { $not: { $in: [propertyNumberValue, new Date(propertyNumberValue)] } } },
+					{ [propertyName]: { $exists: false } },
+				],
+				}],
 			},
 		}],
 		[`${queryOperators.CONTAINS} query filter`, [], {}, undefined, { }, {
@@ -1236,7 +1243,17 @@ const testGetTicketList = () => {
 			queryFilters: [
 				{ propertyName, operator: queryOperators.NOT_CONTAINS, value: [propertyValue, propertyValue2] },
 			],
-			expectedQuery: { $and: [{ $nor: [{ [propertyName]: { $regex: propertyValue, $options: 'i' } }, { [propertyName]: { $regex: propertyValue2, $options: 'i' } }] }] },
+			expectedQuery: { $and: [{
+				$or: [
+					{
+						$nor: [
+							{ [propertyName]: { $regex: propertyValue, $options: 'i' } },
+							{ [propertyName]: { $regex: propertyValue2, $options: 'i' } },
+						],
+					},
+					{ [propertyName]: { $exists: false } },
+				],
+			}] },
 		}],
 		[`${queryOperators.RANGE} query filter`, [], {}, undefined, { }, {
 			queryFilters: [{ propertyName, operator: queryOperators.RANGE, value: [[0, 10], [20, 30]] }],
@@ -1249,12 +1266,19 @@ const testGetTicketList = () => {
 		}],
 		[`${queryOperators.NOT_IN_RANGE} query filter`, [], {}, undefined, { }, {
 			queryFilters: [{ propertyName, operator: queryOperators.NOT_IN_RANGE, value: [[0, 10], [20, 30]] }],
-			expectedQuery: { $and: [{ $nor: [
-				{ [propertyName]: { $gte: 0, $lte: 10 } },
-				{ [propertyName]: { $gte: new Date(0), $lte: new Date(10) } },
-				{ [propertyName]: { $gte: 20, $lte: 30 } },
-				{ [propertyName]: { $gte: new Date(20), $lte: new Date(30) } },
-			] }] },
+			expectedQuery: { $and: [{
+				$or: [
+					{
+						$nor: [
+							{ [propertyName]: { $gte: 0, $lte: 10 } },
+							{ [propertyName]: { $gte: new Date(0), $lte: new Date(10) } },
+							{ [propertyName]: { $gte: 20, $lte: 30 } },
+							{ [propertyName]: { $gte: new Date(20), $lte: new Date(30) } },
+						],
+					},
+					{ [propertyName]: { $exists: false } },
+				],
+			}] },
 		}],
 		[`${queryOperators.GREATER_OR_EQUAL_TO} query filter`, [], {}, undefined, { }, {
 			queryFilters: [{ propertyName, operator: queryOperators.GREATER_OR_EQUAL_TO, value: propertyNumberValue }],